/**
 *    Copyright 2009-2020 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.aapl.script.creator;

import org.apache.ibatis.aapl.annotation.TableWatcher;

import java.lang.reflect.Method;
import java.util.Collection;

public class DeleteBatchSqlCreator implements SqlCreator {

  @Override
  public String createSql(String script, Method method, TableWatcher watcher) {
    StringBuilder sb = new StringBuilder();
    Class<?>[] parameterTypes = method.getParameterTypes();
    if (parameterTypes.length == 0) {
      return script;
    }
    String type;
    Class<?> clazz = parameterTypes[0];
    if (Collection.class.isAssignableFrom(clazz)) {
      type = "collection";
    } else if (clazz.isArray()) {
      type = "array";
    } else {
      return script;
    }
    String table = watcher.value();
    sb.append("<script>");
    sb.append("delete from ");
    sb.append(table);
    sb.append(" where id in ");
    sb.append("<foreach collection='");
    sb.append(type);
    sb.append("' open='(' close=')' item='item' separator=','>");
    sb.append("\n#{item}\n");
    sb.append("</foreach>");
    sb.append("</script>");
    return sb.toString();
  }
}
